[Xen-devel] netback oops in Linux 3.14 / 3.15

[James Dingwall <james-xen@xxxxxxxxxxxxxx>]

Hi,

Under Linux 3.14.6 and 3.15 I am getting a BUG_ON() from netback in 
xenvif_rx_action().  Under 3.15 it is the line at 
629 which is triggering:

BUG_ON(ring_slots_used > max_slots_needed);

The conditions are a 3.15.0 dom0 with Xen 4.4.0, a guest domain running the 
same 3.15.0 kernel, an rsync in the guest 
where the source filesystem is NFS mounted from the dom0.

I have added a printk to log the values which is seen as the first line in the 
attached trace.  Is there an off-by-one 
error in the calculation for max_slots_needed or is it worth adding some more 
printks to find out how the value was 
calculated?

Please let me know if any other information about my configuration is required.

Thanks,
James

Attachment: netback-3.15.0.ooops
Description: Text document

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